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// Copyright 2016 Joe Wilm, The Alacritty Project Contributors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
//! Logging for alacritty.
//!
//! The main executable is supposed to call `initialize()` exactly once during
//! startup. All logging messages are written to stdout, given that their
//! log-level is sufficient for the level configured in `cli::Options`.
use log;
use std::sync;
use std::io;
use cli;
pub struct Logger<T:Send+io::Write> {
level: log::LogLevelFilter,
output: sync::Mutex<T>
}
impl<T> Logger<T> where T:Send+io::Write {
pub fn new(output: T, level: log::LogLevelFilter) -> Logger<io::LineWriter<T>> {
Logger { level: level,
output: sync::Mutex::new(io::LineWriter::new(output)) }
}
}
impl<T> log::Log for Logger<T> where T:Send+io::Write {
fn enabled(&self, metadata: &log::LogMetadata) -> bool {
metadata.level() <= self.level
}
fn log(&self, record: &log::LogRecord) {
if !self.enabled(record.metadata()) {
return
}
let writer = &mut self.output.lock().unwrap();
if self.level < log::LogLevelFilter::Debug {
writer.write(format!("{}\n", record.args()).as_ref()).unwrap();
} else {
writer.write(format!("{}: {}\n",
record.target(),
record.args())
.as_ref()).unwrap();
}
}
}
pub fn initialize(options: &cli::Options) {
log::set_logger(|max_log_level| {
max_log_level.set(options.log_level);
Box::new(Logger::new(io::stdout(), options.log_level))
}).unwrap_or_else(|e| die!("{}", e));
}
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